Tractor seat mount



Patented May 19, 41953 :jTUNIT-ED 'STAT TRACTOR SEAT MOUNT n Walter F.Woodn, Laurens, Iowa Application November 29, 1950, Serial N0.`198,123

(Cl. 155-9) i Claims.

v.This invention relates generally to farm tractor seats and inparticular to a seat attachment or mounting for movably supporting: atractor seatso as to reduce the transmission of road shock to thetractoroperator.

An object of this invention is to provide an improved tractor seatmounting. f

`A further object of this invention is to provide an attachment for atractor seat that supports the seat for iioating movement in ahorizontal 'plane in both transverse and longitudinal directions. A AStill anotherobject of this invention is to provide a seat attachmentfor a tractor Whichfloatingly supports the seat so that the tractoroperator remainsA stationary as the tractor is rocked yorv tilted in itstravel over'an uneven ground surl.-face. v V ,Y Yet another objectofthis invention is to provide a tractor seat attachment which is of asimple design, capable of absorbing road shocks, and ladapted to beeasily andquickly installed on most types` of tractors. j y f Furtherobjects,` Afeatures and advantages of this invention will becomeapparent from the following description whenl taken. in connection withthe accompanying drawings in which:

Fig. l is a side elevational view of the rear. end portion of a tractoryshowing the assembly therewith of the attachment of this invention,andwith parts of the tractor being removed to more clearly show suchassembly; Fig. 2 is a perspectiveview of the seat attachment with partsbroken away for. clarity;

Fig. 3 is an enlarged plan View of the seat attachment shown in Fig. 2;y y

' Fig. l is a side elevational view of the seat attachment; and,

Fig, 5 is an enlarged sectional detail view taken along the line 5-5 inFig. 2.

base section I6 is provided with a series of bolt openingsv I8 forreceiving seat holding bolts (not shown) An elongated tractor mountingmember I9, also formed of a flat bar material, is positioned in avertically spaced parallel relation below the base section I6. Themounting member I9 is-of al shorter length than the base sec'- tion I6so that its opposite ends 2| are spaced 'infwardly from the leg sectionsI'I. A series ofiholes 22 in the mounting member I9 provide for theattaching of such member by bolts (not shown) to the tractor seatsupport I2. 'y

Secured, as by welding, to the free endr 23` of each leg section I1 is atubular bearing member 24. These tubular members 24 are arranged in aparallel relation inplanes extended transversely of the bracket I 4.Similar tubular members, des,-

.ignated as 24a, are secured to the oppositegends .2| ofthe mountingmember I9 in a parallel rela- -tion with thetubular members 24. Theinclinadisposed in a spaced relation, one above Y the With reference tothe drawings the seat attachment or mount of this invention, designatedgenerally as Ill, is illustrated in Fig. 1 in assembled position on atractor II having an upright support I2 provided as standard equipmentfor the tractor seat I3. In the use of the attachment of this invention,and as will appear later, the seat I3 is mounted on the attachment, andthe attachment and seat as a unit are then carried onthe upright supportI2.

The lattachment rI0 includes an invertedU- shaped bracket I4, formed ofa fiat bar material, having a base section I6 and leg sections I'Iprojected downwardly therefrom and inclined inwardly toward each other(Figs. 2 and Il).A The other, namely, in a common vertical plane. g

Then bearing members 24 and 24a rotatably support corresponding rockshafts 26 andj 26a,

-asA illustrated for a tubular member 24 in Fig.- 5. .The opposite ends21 of the rock shaft 2-6 project outwardlyl from the opposite ends ofthetubular `bearing member 24 and secured to such project;-

ed ends v2'I are tubular bearing members 28. The bearing members 28 andthose indicated atv-28a .for the rock shafts 26a have their axesextended normal to the axes of the rock shafts 26 and V26aso that thebearings 28 and 28a are arranged innparallel planes normal to-theplaneso the bearing members 24 and 24a.

As best appears in Figs. 2 and 4, the bearings `V28 corresponding tothebearings 24 are secured to the underside ofV their associated-rockshafts .26'. and` the bearings 28a, corresponding tothe ,bearings 24a,are secured to the top side ofrtheir associated rock shafts 26a.Further, `by virtue of thefbearing members 28 and 28a being se'.-

cured to the ends 21 of the rock shafts 26, and

constitute shaft portions Which are rotatably receved withincorresponding bearings 28 and 28a. The links 3| are maintained inassembled relation within an associated pair of bearings 28 and 28a byCotter keys 33 or the like.

Assuming the mounting member I8 to be stationary it is seen that eachcorresponding pair of tubular bearings 24 and 24a, and associated rockshafts 26 and 25a andV links 3l constitute a parallel link system.providing for the movement of the bracket I4 in a horizontal planelongitudinally of the mounting member I9. During this longitudinalmovement of the bracket I4 the support of the links 3l in the bearings28 and 2te function as iixed connections. In other words, no pivotalmovement of the links 3| takes place within the bearings 28 and 23a.

Similarly, a corresponding pair of shafts 2G and 26a and theirassociated bearings 28 and 23d and links 3I constitute a parallel linksystem providing for the movement of the bracket I4 in a horizontalplane transversely of the mounting memberIS. In this movement, theshafts 25 and 26a function as fixed supports for the bearings28'and`28a. Y It is seen, therefore, that each pair of upright U-links3I are common to What might be termed adual parallel link structure,arranged at each end of the attachment III, and with each of suchstructures constituting essentially a iirst parallel link system-lmovable in one vertical plane, and pivotally supported on a secondparallel link system Which is movable in a, vertical plane normal'to'the vvertical plane of movement of the iirst parallel link system.

l' In the use of the attachment of this invention the tractor seat i3 isreino-ved from the support I2, and is secured to the bracket I4 at theholes I 8. The attachment is then secured to the sup-- port I2 at theholes 22 in the tractor mounting member I9.

In operation, let it be assumed that the tractor vIIis tipped sidewisein its travel over an uneven ground surface. With the tractor operatoron the seat i3, the seat tends. to remain stationary vwhile the tractoris moved relative thereto through the seat attachment of this invention.'Ihusfwith reference to Fig. 3, with the bracket I4 stationary and thetractor tilted in a longitudinal or fore and aft direction, a movementof the mounting member IB transversely of the bracket I4 to its dottedline position, also shown in Fig. 4, takes place by the pivotal movementof the links 3i Within the tubular bearing 28 and 28a,'and with thismovement being of an extent to accommodate the longitudinal tiltingmovement of the tractor.

In a like manner, When the tractor II is tilted sidewise, or in atransverse direction, the bracket I4 tends to remain stationary and amovement of 'the mounting member ifi relative to and longitudinally ofthe bracket i4, from its full, line position to its dotted line positionshown in Fig. 4, takes place by the pivotal movement of the rock shafts2t and 28a Within the tubular members 24 and 24a. It is apparent, ofcourse, that should the tractor be concurrently tipped both transverselyand longitudinally, a concurrent pivotal 'movement of the links 3IWithin the bearings.

28 and 28a, and a rocking movement of the shafts 26 and 26a within thebearings 24 and 24a would also take place so as to provide for aconcurrent 'movement of the mounting member I9` both transversely andlongitudinally of the bracket I 4. Itis seen, therefore, that theattachment provides what might be termed a floating support orsuspension of the seat I3 which permits the tractor 4operator to remainstationary relative to the movement of the tractor. Stated otherwise,the tractor moves relative to the tractor operator in response to itstravel over an uneven ground surface, and with the shocks and joltsresulting from such travel being absorbed by the floating action of theattachment. Thus not only does the attachment function asa shockabsorbing unit, but by virtue of the seat I3 being supported in afloating position so as to remain stationary relative to the tractor, norubbing action occurs between the seat I3 and the tractor operatorso asto substantially preclude any skin irritation and soreness.

Although the invention has been described with respect to a preferredembodiment thereof it is to be understood that it is not to be solimited since changes can be made therein which are within the fullintended scope of this invention as defined by the appended claims.

I claim: I

1. A seat attachment for a tractor comprising an inverted U -shapedbracket member having a base section for carrying a seat, a mountingmember adapted to be secured to the tractor, with said mounting memberbeing positioned be- 10W and longitudinally o-f said base sectionbetween the leg sections of said bracket member, first tubular members,certain of Which are fixed at each e-nd of said mounting member andothers of which are xed to the free end of each of said leg sections,said first tubular members being arranged transversely of said mountingmember in a horizontal parallel spaced relation, rock shaftscorresponding to and supported Within said tubular members, secondtubular members fixed to each end of said rock shafts, said secondtubular members being arranged in a parallel spaced relation normal tosaid first tubular members, and U-shaped link members, with each linkmember being in a substantially upright position with the terminal endsthereof rockably supported in correspondingvertically disposed pairs ofsaid second ltubular members'.

2. A. seat attachment for a tractor comprising a stationary memberadapted to be iixed on the tractor, a movable member for carrying aseat, a first pair of oppositely arranged parallel link systems,including upright link members movably connected with saidr two members,to provide for the horizontal movement of said movable member.transversely of said stationary member, and a second pair of oppcsitelyarranged parallel link systems movably connected with said firstparallel link systems for movement in a plane normal to the plane ofmovement of said iirst pair of parallel link systems to provide for thehorizontal movement of said movable member longitudinally of stationarymember, with said upright link members being com con to said iirst andsecond pairs of link systems.

3. A seat attachment for a tractor comprising an inverted U-shapedbracket having a base section for carrying a seat, a tractor mountingmember arranged between the leg sections of said bracket member in aparallelspaced relation with said base section, rock shafts certain 0fwhich are rockably supported at each end of said mounting member andothers adjacent the free ends of said leg sections, said rock shaftsybeing in a parallel relation extended transversely of said mountingmember, a bearing member xed to each end of said rock shafts, saidbearing members having the axes thereof normal to the axes of said rockshafts, and upright U-shape link members connected between correspondinglvertically disposed ends of said rook shafts with the terminal endportions thereof roekably supported within a corresponding pair of saidbearing members.

4. A seat attachment for a tractor including a mounting member, a seatsupporting member arranged in a spaced parallel relation above saidmounting member having lateral end portions projected downwardly andterminating below said mounting member, transversely extended rookshafts .Supported at each end of said two members, longitudinallyextended bearing members secured to each end of said rock shaft-s, andupright link members of a U-shape each corresponding to a pair ofbearing members disposed one above the other, with the leg sections of alink member being rotatably supported within a corresponding pair ofsaid bearings.

5. A seat attachment for a tractor including a seat carrying memberhaving a horizontal center References Cited in the file of this patentUNITED STATES PATENTS Number Name Date 1,727,691 Baum Sept. 10, 19292,522,873 Johnson Sept. 19, 1950 FOREIGN PATENTS Number Country Date631,522 France Dec. 22, 1927

